 spell priest level 1 school divination reversible sphere numbers range 0 comp s m duration instantaneous cast_time 4 aoe the caster save none by means of this spell the priest can accurately estimate the chance of success of one specific action such as climbing a dangerous cliff making a trick bowshot crossing a burning room unharmed or even striking an enemy the action in question must be one that would normally be resolved by a die roll but the priest doesnu8e28099t have to be the person who attempts the feat; he can use calculate to estimate the odds for anyone taking an action in his sight the priest has a 70 chance 2 per level of making an accurate estimate if successful the dm reveals to the player the actionu8e28099s chance for success or any modifiers that may be in play for example he could reveal a particular opponentu8e28099s armor class or thac0 the saving throw an opponent would require in order to save against a particular spell cast by the priest or the priestu8e28099s wizard companion or a characteru8e28099s chance to open doors bend bars or use a thief ability the priest could even calculate his odds for actions that might be resolved by a die roll or dm caprice such as his chance to avoid detection by hiding behind a rock this spell takes into account factors that the priest himself may not be aware of so from time to time a character may receive some very confusing results from this spell for instance if the priest doesnu8e28099t know that an orc chieftain is actually a polymorphed tanaru8e28099ri masquerading as an orc he may be astonished to learn that the orc has a thac0 of 7 if the priest fails his calculation check with a roll of 99 or 00 his calculation is wildly skewed in a random fashion the material component for this spell is a miniature abacus of ivory worth at least 100 gp it is not consumed in the casting of the spell 